Process for transmission of analog and/or digital information, especially with an in-line arrangement of one, two or more exchanges in telecommunications systems
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United States of America Patent
Stats
-
Aug 7, 1990
Grant Date -
N/A
app pub date -
Jan 25, 1988
filing date -
Jan 26, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In transmission of information over junction routes with exchanges, the feedback circuits that occur in hybrid sets are a major problem. High demands are made of them and the balancing networks. This invention eliminates these shortcomings in that quasi-4-wire circuits are formed by providing coded alternating currents of different frequencies and/or frequency positions for the two transmission directions and filters with high stop band attenuation for the opposite direction are provided when it is necessary to separate the two transmission directions.
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